1989740376 has 192 divisors, whose sum is σ = 6161675520. Its totient is φ = 597663360.

The previous prime is 1989740353. The next prime is 1989740387. The reversal of 1989740376 is 6730479891.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1085781 + ... + 1087611.

It is an arithmetic number, because the mean of its divisors is an integer number (32092060).

Almost surely, 2^1989740376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989740376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3080837760).

1989740376 is an abundant number, since it is smaller than the sum of its proper divisors (4171935144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1989740376 is a wasteful number, since it uses less digits than its factorization.

1989740376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1892 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 1989740376 is about 44606.5059828721. The cubic root of 1989740376 is about 1257.7629694548.

The spelling of 1989740376 in words is "one billion, nine hundred eighty-nine million, seven hundred forty thousand, three hundred seventy-six".